Interesting. A friend and I are heading to HNL this week. Her husband has Enterprise certs, which we found out aren't transferable to spouses, and the $350 cost of a 2.5 day non-airport rental was more than we were willing to pay for our last days on the island. If we hadn't found and booked $170 all in HNL rental for those days through Autoslash, we would have done Hui or Zipcar after my reading this thread. Heck, if get an itch for a drive before the end of our trip, we may well go this route. Thanks, all, for sharing.